Cc to Horsepower Calculator – Loan calculator

CC to Horsepower (HP) Calculator

Engine Displacement (CC):

Engine Type / Performance Level: 4-Stroke Small Engine (Lawnmower/Utility) 4-Stroke Standard (Moped/Commuter) 4-Stroke High Performance (Sport Bike) 2-Stroke Standard (Scooter/Dirt Bike) 2-Stroke Competition (Racing) *Ratio varies by engine efficiency and cooling.

Estimated Output

0 HP

0 kW

function calculateHP() { var cc = parseFloat(document.getElementById('ccInput').value); var divisor = parseFloat(document.getElementById('engineType').value); var resultArea = document.getElementById('resultArea'); var hpOutput = document.getElementById('hpResult'); var kwOutput = document.getElementById('kwResult'); if (isNaN(cc) || cc <= 0) { alert("Please enter a valid CC value."); return; } // CC to HP is not a direct conversion, it's an estimation // Logic: CC / Divisor = HP var estimatedHP = cc / divisor; var estimatedKW = estimatedHP * 0.7457; hpOutput.innerHTML = estimatedHP.toFixed(2) + " HP"; kwOutput.innerHTML = estimatedKW.toFixed(2) + " kW"; resultArea.style.display = "block"; }

How to Convert CC to Horsepower

Understanding the relationship between an engine's displacement (CC) and its power output (Horsepower) is a common challenge for motorcycle owners, small engine enthusiasts, and hobbyists. While there is no perfect mathematical constant to convert one to the other, the general rule of thumb for small 4-stroke engines is that 15cc to 17cc equals approximately 1 horsepower.

The Basic Formula

To estimate the horsepower of a small engine, you can use the following formula:

            Horsepower (HP) ≈ Engine Displacement (CC) / 15
        

Why the Conversion Isn't Precise

It is important to remember that "CC" (Cubic Centimeters) measures volume (how much space is inside the cylinders), whereas "Horsepower" measures work over time. Several factors influence how much power an engine actually produces from its displacement:

Engine Cycle: 2-stroke engines generally produce significantly more power per CC than 4-stroke engines because they fire twice as often.
Cooling Systems: Liquid-cooled engines can maintain higher tolerances and higher RPMs than air-cooled engines, leading to higher HP.
Fuel Delivery: Fuel-injected engines are typically more efficient and powerful than older carbureted models.
Compression Ratio: Higher compression ratios extract more energy from the fuel-air mixture.

Realistic Conversion Examples

Engine Size (CC)	Average HP (4-Stroke)	Common Use
50cc	2.5 – 3.5 HP	Mopeds / Chainsaws
125cc	8 – 12 HP	Small Motorcycles
250cc	15 – 25 HP	Quarter-liter Bikes
600cc	60 – 120 HP	Sport bikes (High Performance)

Frequently Asked Questions

Is 1000cc always 100 HP?
No. A 1000cc Harley Davidson cruiser might produce about 70-80 HP, while a 1000cc BMW S1000RR sport bike can produce over 200 HP. Efficiency and engine tuning are the deciding factors.

How do I convert HP back to CC?
To estimate CC from HP, multiply the Horsepower by 15. For example, a 10 HP engine is roughly 150cc.

What is the difference between HP and kW?
Horsepower is the imperial unit of power, while Kilowatts (kW) is the metric unit. 1 HP is equal to approximately 0.7457 kW. Most international vehicle specifications will list both.